MCQ
If a parallelopiped is formed by planes drawn through the points (5, 8, 10) and (3, 6, 8) parallel to the coordinate planes, then the length of diagonal of the parallelopiped is:
- A$2\sqrt{3}$
- B$3\sqrt{2}$
- C$\sqrt{2}$
- D$\sqrt{3}$
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The value of $\sin\frac{\pi}{18}+\sin\frac{\pi}{9}+\sin\frac{2\pi}{9}+\sin\frac{5\pi}{18}$ is given by:
$\sin\frac{7\pi}{18}+\sin\frac{4\pi}{9}$
$1$
$\cos\frac{\pi}{6}+\cos\frac{3\pi}{7}$
$\cos\frac{\pi}{9}+\sin\frac{\pi}{9}$
The value of $\cos12^\circ+\cos84^\circ+\cos156^\circ+\cos132^\circ$ is:
$\frac{1}{2}$
$1$
$-\frac{1}{2}$
$\frac{1}{8}$